/*
 *  Twidere X
 *
 *  Copyright (C) 2020-2021 Tlaster <tlaster@outlook.com>
 * 
 *  This file is part of Twidere X.
 * 
 *  Twidere X is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  Twidere X is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with Twidere X. If not, see <http://www.gnu.org/licenses/>.
 */
package com.twidere.twiderex.utils

import android.net.ConnectivityManager
import android.net.Network
import android.net.NetworkCapabilities
import android.net.NetworkRequest
import androidx.core.net.ConnectivityManagerCompat
import androidx.lifecycle.LiveData

class IsActiveNetworkMeteredLiveData(
    private val connectivityManager: ConnectivityManager,
) : LiveData<Boolean>() {
    private val request = NetworkRequest.Builder().build()
    private val networkCallback by lazy {
        object : ConnectivityManager.NetworkCallback() {
            override fun onCapabilitiesChanged(
                network: Network,
                networkCapabilities: NetworkCapabilities
            ) {
                updateValue()
            }
        }
    }

    private fun updateValue() {
        postValue(
            ConnectivityManagerCompat.isActiveNetworkMetered(
                connectivityManager
            )
        )
    }

    override fun onActive() {
        super.onActive()
        updateValue()
        connectivityManager.registerNetworkCallback(
            request,
            networkCallback,
        )
    }

    override fun onInactive() {
        super.onInactive()
        connectivityManager.unregisterNetworkCallback(networkCallback)
    }
}
